织物的过程化双向纹理函数生成算法

针对编织式样具有近似规则的微观几何结构这一特点，提出了一种基于织物几何中结构建模的过程化双向纹理函数生成算法．首先从分析编织式样的结构人手，得出编织式样变形的基本单元——可见丝线段；然后通过对其进行数学建模并按编织式样进行组合，产生了织物的几何中结构；最后利用光线跟踪算法实现了编织式样在不同光照和视线条件下的纹理外观，从而生成织物的双向纹理函数纹理．

Procedural Bi-directional Texture Function Synthesis of Woven Fabrics

In this paper we present an approach to bi-directional texture function (BTF) synthesis of woven fabrics, which have approximately regular structures in fine scale. The approach starts from an analysis of the weave pattern and finds out the basic deformation element of the woven fabrics: visible thread segment. By modeling of the visible thread segment and combining it with the weave pattern matrix, we obtain the meso-structure, or surface detail of the woven fabrics. Lastly, each texture image of the BTF is synthesized through a ray-tracing process over the generated detail surface of the weave pattern for each given view and light direction.